acetic acid 3,5-diacetoxy-2-[(9H-fluoren-9-yl-methoxycarbonylamino)-methyl]-6-(2-oxo-2,6,7,7a-tetrahydro-benzofuran-6-yloxy)-tetrahydro-pyran-4-yl ester

(S)-6-Hydroxy-7,7a-dihydro-6H-benzofuran-2-one

6-hydroxy-4-(4-methoxy-benzyloxy)-cyclohex-2-enone

6-(4-methoxy-benzyloxy)-7,7a-dihydro-6H-benzofuran-2-one

6-(tert-butyl-dimethyl-silanyloxy)-4-(4-methoxy-benzyloxy)-cyclohex-2-enone